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J. PIERRON. Y

- POLISHING MACHINE. I v

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WITNBSSES 5 LEE@ N. PETERS. Mmwnwm wumnmm ma f YUNITED STATES PATENT OFFICE.

JEAN PIERRON, OF ELIZABETHPORI, NEW JERSEY.

POLISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 292,677, dated January 29, 1884.

i Application tiled October 25, 1883. (No model.)

To all whom it may concern:

Be it known that I, J EAN PIERRON, of Elizabethport, in the county of Union and State of New Jersey, have invented a new and useful Improvement in Polishing-Machines, of which "the following is a full, clear, andy exact description.

Ihe object of my invention is to provide a new and improved machine for polishing wood stone, and other materials.

" The inventionv consists in certain improve-` ments in polishing-machines, as will be hereinafter described, and specifically set forth in the claims.

Reference is lto be had to the accompanying` drawings, forming part of this specication, in which similar letters of reference indicate corresponding parts in all the figures.

Figure I is a side View of my improved polishing-machine; Fig. 2, a plan View of the same. Fig. 3 is a cross-sectional elevationof part of the same on the line x w, Fig. 2.

In the outer end of a laterally-swinging frame, A, an upright shaft,B, is journaled, on which are rigidly mounted two belt-pulleys, C and ID, and on the said shaft B are also loosely mounted the shanks of a fork, E, formed on the end of Va rod, F. A belt, G, passes over the pulley G,.and over a drum or cylinder, H, journaled in the pivoted end of the frame A, over which cylinder a drivingbelt, J, passes, which also passes over suitable guide-pulleys, K. This frame A'is vertically adjustable by means of a sliding bracket,

"a, Working on two guide-rods, a a', mounted on attaching-arms c c, one of whichrods a passes through the end of said framev A, and through the drum, and said bracket a is caused `to reciprocate by means of 'a screw threaded rod, b, working through a screwthreaded boss on the central part of the bracket. The adjusting-rod is provided with an operating hand-wheel.

To the free end of the rod F a standard, I, formed on a plate, L, is pivoted, which standard is provided with arms, in which a vertical shaft, M, is journaled, on the lower end of which shaft the abrading block or disk N is held, which is adapted to revolve in a centralaperture-of the plate L. The shaft M and the disk N are pressed downward by a spiral spring, O, surrounding the shaft M between the lower arm of the standard I and the abrading-disk N. On the shaft M a grooved belt-pulley, P, is rigidly mounted,

over which and the pulley D a driving belt or cord, Q, is passed. The plate L is pro-' vided with a handle, It, 'for guiding it. The abradingdisk N, which is made of any suitable material, is preferably recessed in the bottom. Ihe plate L is placed on the material to be polished-for instance, a slab of stonee-,and is guided by means of the handle It. lIhe disk N, revolved by the belts J, v G, and Q, acts on the surface of the material and polishes it, the disk N being pressed on the material by the spring O. When the disk VN is worn out, it can easily be replaced by an other. The plate L can easily be moved laterally and vertically, as maybe necessary in passing the cutting-disk over the face of the work.

Having thus described'my invention, what I claimas new, and desire to secure by Letters Patent, is#

1. In a polishing-machine, the combination, with lthe plate L, havingA a standard, I, and a central aperture, of the shaft M, journaled in arms of the standard I, the abradingdisk N, mounted on the lower end of the shaft M, and adapted to revolvein the aperture of the plate L, the spring O, and of means for re-A volving the shaft M, substantially as herein shown and described.

2. In a polishing-machine, the combination, with the plate L,.having a standard, I, of the shaft M, journaled in arms of thelstandard I, the abrading-disk N, mounted on the lower end ofthe shaft M, and adapted to revolve in an aperture of the plate L, the spring O, the handle It, and means forrevolving the shaft M, substantially as herein shown and described.

3. In a polishing-machine, the combination, with the plate L, provided with va standard, I, of a laterally-swinging rod,`F, to which the standard I is pivoted, the shaft M, the disk N, and of means for revolving the shaft M, 

